No more connections allowed.

This is a very very rare error message. This used to mean that you were allowed only 1 connection to your ISP, and that someone was logged in with your username, either yourself from a different computer, or someone else logged in as you... The other thing is that if the ISP's keepalive is set to high, and you disconnected and reconnected before the keepalive expired, the ISP wouldn't know that you disconnected and reconnected..

If this happens to you, log off, wait 2 minutes and try again, if you still get this, give your helpdesk/tech support a call and let them know, either they can verify that someone is logged in as you, then they can boot them off, or they are having a problem.